code: def test_printing_doesnt_crash(self):
      flag = FlagField(True)
      print(flag)
  
file_path: allennlp/tests/data/fields/flag_field_test.py
imports: import pytest
  from allennlp.common.testing.test_case import AllenNlpTestCase
  from allennlp.data.fields import FlagField
label_desc: Use image node_id 3 for calling the TestFlagField obj's underlying member method code with example usage: obj.test_printing_doesnt_crash() without return types